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7th Unit 4 Vocab

7th grade unit 4 vocabulary

Biogenesis theory which states that life can only come from other life
Controlled Experiment An experiment which has two groups kept in the same environment under the same conditions; one group is tested by changing one factor
Inorganic A substance that does not contain carbon
Organic A substance that contains carbon, an element found in all living things
Ozone The layer of the atmosphere that protects the earth from the sun's radiation
Spontaneous Generation The belief that living things can impulsively generate from nonliving materials
Carnivore A consumer that eats only other animals
Consumer An animal that relies on plants or other consumers for food and energy
Decomposer A consumer that breaks down dead organisms into material that is absorbed into the soil
Energy Pyramid A model that shows the transfer of energy from producers to different types of consumers
Fight-or-Flight A response that occurs when an animal feels threatened by a predator and prepares to either fight the predator or run away
Herbivore An animal that obtains food and energy directly from producers, or plants
Homeostasis The tendency of an organism to respond to stimuli in order to maintain a stable internal environment
Omnivore A type of consumer that can eat both plants and animals
Organ A collection of tissues that share a common function
Organ System A group of organs working together to perform a specific function
Phototropism The growth of a plant in response to light
Primary Consumer An organism that consumes producers
Producer An organism that is able to make food by means of photosynthesis
Secondary Consumer An organism that eats primary consumers
Stimulus Any change in an organism or its environment that causes a response
Taxonomy A classification system that arranges organisms into categories
Tertiary Consumer An organism that eats secondary consumers
Tissue A group of cells that share a function
Biomass Organic matter in organisms which can be broken down and used as energy
Chemical Change A change that alters the chemical composition of a substance
Compost Pile A mixture of decaying organic material
Fission Process of breaking or splitting a nucleus
Force A push or pull
Friction A force that resists motion when two surfaces rub together
Fusion Process of joining nuclei together
Heat The transfer of thermal energy from one object to another or from an object to its surroundings, due to a difference in temperature
Inertia The tendency of an object to resist a change in motion
Kinetic Energy Energy of motion
Law of Conservation of Energy The law that states that energy cannot be created or destroyed, but it can be transformed
Law of Conservation of Mass The law that states that mass cannot be created or destroyed; it is conserved
Mechanical Advantage occurs when the force of a person applies is multiplied by using a machine
Net Force The combination of two forces acting on an object
Newton Unit of measurement of force
Nitrogen Fixation Combining nitrogen with other elements to make it useful to organisms
Physical Change A change that alters the form, state, or appearance of matter, but not its chemical composition
Potential Energy An object's stored energy because of its position
Temperature The measure of the average kinetic energy of the particles of an object
Work Takes place when force is applied to an object, and the object moves in the direction of the force
Created by: Hillerywest